1. Faulty Oxygen Sensor: A malfunctioning oxygen sensor can incorrectly report the air-fuel ratio, causing the engine to run rich or lean. This can lead to rough idling and engine stalling.
2. Clogged Fuel Filter: A dirty or clogged fuel filter restricts fuel flow to the engine, causing it to run lean and stall.
3. Faulty Spark Plugs or Ignition Coils: Worn-out spark plugs or faulty ignition coils can result in incomplete combustion, causing rough idling and engine stalling.
4. Vacuum Leaks: Vacuum leaks can cause the engine to run lean and stall.
5. Idle Air Control (IAC) Valve Issues: A faulty IAC valve can disrupt the engine's idle speed and cause stalling.
6. Throttle Position Sensor (TPS) Problems: A malfunctioning TPS can provide incorrect data to the engine control unit (ECU), affecting the air-fuel mixture and causing stalling.
7. Faulty Engine Coolant Temperature (ECT) Sensor: An incorrect ECT sensor reading can affect the fuel injection and ignition timing, leading to rough idling and stalling.
8. Transmission Issues: In some cases, transmission problems (such as a faulty torque converter or transmission fluid issues) can cause the engine to stall or run rough.
Diagnosing the Issue:
To accurately identify the cause of the engine light being on and the rough running condition, it's recommended to have your Jeep Liberty diagnosed by a professional mechanic. They will be able to use diagnostic tools to identify any fault codes stored in the ECU and perform tests to pinpoint the exact cause.
It's important to address this issue promptly to prevent further damage to your vehicle's engine and ensure safe and reliable operation.
